/*
 *
 * Paros and its related class files.
 * 
 * Paros is an HTTP/HTTPS proxy for assessing web application security.
 * Copyright (C) 2003-2004 Chinotec Technologies Company
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the Clarified Artistic License
 * as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * Clarified Artistic License for more details.
 * 
 * You should have received a copy of the Clarified Artistic License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package org.parosproxy.paros.extension.filter;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

import org.parosproxy.paros.network.HttpMessage;

/**
 * 
 * To change the template for this generated type comment go to Window -
 * Preferences - Java - Code Generation - Code and Comments
 */
public class FilterLogRequestResponse extends FilterAdaptor {

	private static final String logFile = "filter/message.txt";
	private static final String delim = "====================================";
	private static final String CRLF = "\r\n";
	private File outFile = new File(logFile);
	private BufferedWriter writer = null;
	private long lastWriteTime = System.currentTimeMillis();
	private int counter = 1;

	/*
	 * (non-Javadoc)
	 * 
	 * @see com.proofsecure.paros.extension.filter.AbstractFilter#getId()
	 */
	public int getId() {
		return 40;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see com.proofsecure.paros.extension.filter.AbstractFilter#getName()
	 */
	public String getName() {
		return "Log request and response into file (" + logFile + ")";
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * com.proofsecure.paros.core.proxy.ProxyListener#onHttpRequestSend(com.
	 * proofsecure.paros.network.HttpMessage)
	 */
	public void onHttpRequestSend(HttpMessage httpMessage) {

	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * com.proofsecure.paros.core.proxy.ProxyListener#onHttpResponseReceive(
	 * com.proofsecure.paros.network.HttpMessage)
	 */
	public void onHttpResponseReceive(HttpMessage httpMessage) {

		if (!httpMessage.getRequestHeader().isText()
				|| httpMessage.getRequestHeader().isImage()
				|| httpMessage.getResponseHeader().isImage()) {
			return;
		}
		StringBuffer sb = new StringBuffer();
		sb.append(httpMessage.getRequestHeader().toString());
		sb.append(httpMessage.getRequestBody().toString() + CRLF);

		if (!httpMessage.getResponseHeader().isEmpty()) {
			sb.append(httpMessage.getResponseHeader().toString());
			sb.append(httpMessage.getResponseBody().toString() + CRLF);
		}

		writeLogFile(sb.toString());
	}

	private synchronized void writeLogFile(String line) {
		try {

			if (getWriter() != null) {
				getWriter().write("===== " + counter + " " + delim + CRLF);
				getWriter().write(line + CRLF);
				counter++;
			}
			// avoid close file frequently
			// getWriter().close();
		} catch (Exception e) {
		}

	}

	public synchronized void timer() {
		if (writer != null && System.currentTimeMillis() > lastWriteTime + 5000) {
			// 5s elapse and no more write. close file.

			try {
				writer.close();
				writer = null;
			} catch (IOException e) {
			}
		}
	}

	private synchronized BufferedWriter getWriter() throws IOException {
		if (writer == null) {
			writer = new BufferedWriter(new FileWriter(outFile, true));
		}
		return writer;
	}

}
